特別是把SQL中 把where,order,limit,IN/not IN,like等常用短句都包含進CDbCriteria這個類中去,這樣整個代碼會比較規範,一目瞭然。
$criteria =newCDbCriteria;
$criteria->addCondition("id=1"); //查詢條件,即where id =1
$criteria->addInCondition('id', array(1,2,3,4,5));//代表where id IN (1,23,,4,5,);
$criteria->addNotInCondition('id',array(1,2,3,4,5));//與上面正好相法,是NOT IN
$criteria->addCondition('id=1','OR');//這是OR條件,多個條件的時候,該條件是OR而非AND
$criteria->addSearchCondition('name','分類');//搜索條件,其實代表了。。where name like '%分類%'
$criteria->addBetweenCondition('id', 1, 4);//between1 and 4
$criteria->compare('id',1); //這個方法比較特殊,他會根據你的參數自動處理成addCondition或者addInCondition,
//即如果第二個參數是數組就會調用addInCondition
$criteria->addCondition("id = :id");
$criteria->params[':id']=1;
$criteria->select = 'id,parentid,name';//代表了要查詢的字段,默認select='*';
$criteria->join = 'xxx'; //連接表
$criteria->with = 'xxx';//調用relations
$criteria->limit =10; //取1條數據,如果小於0,則不作處理
$criteria->offset =1; //兩條合併起來,則表示 limit 10 offset1,或者代表了。limit 1,10
$criteria->order = 'xxx DESC,XXX ASC' ;//排序條件
$criteria->group = 'group 條件';
$criteria->having = 'having 條件 ';
$criteria->distinct = FALSE;//是否唯一查詢
class Floors extends CActiveRecord{
public static function model($className = __CLASS__) {
return parent::model($className);
}
public function tableName() {
return "{{floors}}";
}
public function getFloors(){
$condition=new CDbCriteria();
$condition->select='floors.id,floors.category_id,category.category_name';
$condition->alias='floors';
$condition->join='LEFT JOIN clz_category category ON floors.category_id=category.id';
$result=$this->model()->findAll($condition);
return $result;
}
public function rules() {
return array(
);
}
}